Phenol and 4-chlorophenol biodegradation by yeast Candida tropicalis in a fluidized bed reactor

摘要: The objective of this work was to evaluate (i) the hydrodynamics and oxygen transfer characteristics a fluidized bed reactor (FBR) (ii) their performance in continuous biodegradation phenol (Phe) 4-chlorophenol (4-CP)-containing influent when FBR loaded with Candida tropicalis yeast immobilized onto granular activated carbon (GAC) particles. first part carried out terms behavior mixing time (tm95), bubble diameter (dB), gas hold-up (eG), gas–liquid interfacial area (a � ) coefficient (kLa) biphasic (gas–liquid) triphasic (gas–liquid–carbon) systems, both batch-wise operated pseudohomogeneous regime at superficial flow rates UG below 1.72 cm s −1 . Mixing determined using tracer technique, eG measured by volume expansion method; (dB) procedure reported Poulsen Iversen kLa transient gassing-in technique. It found that hydrodynamic variables were severely influenced GAC dB values smaller than system, consequent increase